WINCHAIN - a framework allowing multiple processors between core and winport

This is the code I built trying to figure out the large window size issue.
It completely compiles out if not needed (see -DWINCHAIN in hints/macos10.7)
and except for one call during setup has zero overhead if compiled in and
not used.  See window.doc for more info.

Defs for UNUSED parms.  I know this has been controversial, so use is isolated
to the chain code and windows.c (where it shouldn't be intrusive and saves about
50 warnings).

Hints file for 10.7, but the build process still needs to be migrated from
the branch.

include/config.h

@@ -445,6 +445,7 @@ typedef unsigned char	uchar;
 #define STATUS_VIA_WINDOWPORT	/* re-work of the status line updating process */
 #define STATUS_HILITES		/* support hilites of status fields */
 #define DUNGEON_OVERVIEW	/* dungeon overview by Hojita Discordia */
+/* #define WINCHAIN*/		/* stacked window systems */
 /* End of Section 5 */
 
 #include "global.h"	/* Define everything else according to choices above */